diff --git a/ethers-core/src/types/log.rs b/ethers-core/src/types/log.rs
index 9f66589e2..b82979666 100644
--- a/ethers-core/src/types/log.rs
+++ b/ethers-core/src/types/log.rs
@@ -30,7 +30,7 @@ pub struct Log {
 
     #[serde(rename = "blockTimestamp")]
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub block_timestamp: Option<u64>,
+    pub block_timestamp: Option<U64>,
 
     /// Transaction Hash
     #[serde(rename = "transactionHash")]